sds.RdMethods to create a SpatRasterDataset. This is an object to hold "sub-datasets", each a SpatRaster that in most cases will have multiple layers.
See describe for getting information about the sub-datasets present in a file.
# S4 method for missing
sds(x)
# S4 method for character
sds(x, ids=0)
# S4 method for SpatRaster
sds(x, ...)
# S4 method for list
sds(x)
# S4 method for array
sds(x, crs="", extent=NULL)character (filename), or SpatRaster, or list of SpatRaster objects, or missing. If multiple filenames are provided, it is attempted to make SpatRasters from these, and combine them into a SpatRasterDataset
optional. vector of integer subdataset ids. Ignored if the first value is not a positive integer
character. Description of the Coordinate Reference System (map projection) in PROJ.4, WKT or authority:code notation. If this argument is missing, and the x coordinates are within -360 .. 360 and the y coordinates are within -90 .. 90, longitude/latitude is assigned
additional SpatRaster objects
SpatRasterDataset
s <- rast(system.file("ex/logo.tif", package="terra"))
x <- sds(s, s/2)
names(x) <- c("first", "second")
x
#> class : SpatRasterDataset
#> subdatasets : 2
#> dimensions : 77, 101 (nrow, ncol)
#> nlyr : 3, 3
#> resolution : 1, 1 (x, y)
#> extent : 0, 101, 0, 77 (xmin, xmax, ymin, ymax)
#> coord. ref. : Cartesian (Meter)
#> source(s) : logo.tif, memory
#> names : first, second
length(x)
#> [1] 2
# extract the second SpatRaster
x[2]
#> class : SpatRaster
#> dimensions : 77, 101, 3 (nrow, ncol, nlyr)
#> resolution : 1, 1 (x, y)
#> extent : 0, 101, 0, 77 (xmin, xmax, ymin, ymax)
#> coord. ref. : Cartesian (Meter)
#> source(s) : memory
#> names : red, green, blue
#> min values : 0.0, 0.0, 0.0
#> max values : 127.5, 127.5, 127.5
a <- array(1:9, c(3,3,3,3))
sds(a)
#> class : SpatRasterDataset
#> subdatasets : 3
#> dimensions : 3, 3 (nrow, ncol)
#> nlyr : 3, 3, 3
#> resolution : 1, 1 (x, y)
#> extent : 0, 3, 0, 3 (xmin, xmax, ymin, ymax)
#> coord. ref. :
#> source(s) : memory